Telephone system.



s. BABCOCK, TELEPHONE SYSTEM. APPLICATiON FILED JULYS, 910.

m a M w a a j M 5 M maow m v E v n L Q f ,m MMKM .P WK

' eiice being bad to during ihe co iiection wiij ,new and usefuiimprovement in eeeeieoii nerecoc' t, c1? mcmme, New yam; eesxenon ToTELEGHB NQMETE 1 Z QG'MPAIITY, o1? eocimemze, new 1cm; .e

e ice'e eme coeseoim'rxoii or New $03K.

To all whcm it may conccozz A I Be it known that I, GARRISQN Bzmcocx,

citizen ofi'the United States,

lemme, in the county of Monroe and fBt-ate *ofNew York, have invented acertain dystec f 'of'whichthe following is zi fuii', cieeeconcicc andexact description, refcrings, forming; a, part thGYGOf. o

My invec mod has ior'ite o'bjiecito provide a means at' & substation on;dperty Hume which e message meter a iid time meter are located forermitting the apparatus 50 be used to deigc M 7 Without actuating shemessage meter. The apperetus'tiius empiloyed While "1%, permits the sibs cribecteheei" the condition of the ii'n'ejdoesnot howe'ver, permithim to useshe iioe Without actuating such message mem The time meixczpont cipher hand, is pref embiy'ccimecied so that co iiinu'ed listening" inis reg stered. v

My im'en'cion :Eurflier provides 3111921118 by which the time meter 0?meters associated with a calling Time-cannot be actuated untli eeiiedsubscriber. Upon the response of the called S\lbS(:11i 1f the zip theresponse 0:5. 12.13

pmiatiis iccaied a? the exchange is actuated, winch results 111 theconnect-ion of mpulse-w opera "veiy connected ao' *3 xcelling linescribeic in addition to the 0 my'inventicn further grovides that afterthe called subscriber has effected adopter a tive condition in": theimpulge-sending meche anism at the exchange further control. of

such impuieesending mechainiem isiemoved during connection The timemetering n'iechanisiii located at a sobstaiiion is COl'iEtYl'IC'GQQ soto iregister' the number; of time umts o'j servlce, which un ts arepreferably of such a length asto e Sgiecificeticn of i'ictfcers Ieztenc.Y e ucemn filed 111 15, ism. Serial 1%. 57mm 'fesiding at Teiephone .usea, fractional of'bimc, such fractional the accompanying drew iiineWheihe'n the line is busy ion, and the impulses cii'us sent cc-$11 eieLhe time meter or ZHQ$$ which me'y be e called, subdeviccslelreiidy:referred I e eiiei therewith so athe spring 12 iiyely oi the messagemeter 15.

the ceiiing subscribem iselso connected v'vl hthe armai'ure l6 ofthewith thegiivotei point vei of the caliin subscriber and v spring id isconnecteo contaci; 3G and one 'berminaifof th'eimnsr fame-wa e e, @164110% require an excessive nmnber of current rcversaisihrough the callingline for any particular connection and yet short enoughto .i'egistecwith practical accuracy. the le igth of time of any conversation, It hasbeech-and? in practice that; it is advisable to ifiill'i, of in minuteas the unit part being inversely proporiipnai to thcddistence, and theunit of service value thus measured is called 2- tclechrc'nc, which maybe made up of differentquantities of time and distance values Figure 11s a diagrammatic circuit draw-v;

ing of ieiephcne systeny m a'ccordmice with my iiwen'bioii.

'Fig. 2 is adet'aii View of: theniessage metering mechanism. o

As shown in Fig. i, the line wires 1, 2e tend to file, siibstmiions Aand A ,Whiie the Y, iiiie Wires 3, e extend from the exchange to "thesubstatidns and B; Thesubst atioiis b it is to be uncle stood. that eachsubstahon 1s prefer-em cimiiax ly equipped with of the apparatus 1of"sated e1? e1 eingie substation is; e11 that is: necessary in thisconnection. I d x Theiinewires 1,, QGXEQIKE. from the'syrings wand 6 ofthe jack J located at the exchange to the terminal posts 7 arid 8,reepectiveiy, at the substation A, the line wire Qheving inciudei. ienchsubstetion a time mctel adapted to be i d acid-rated by mirrenfireversals in the line circuiiz, each reversaijsorving to advance the 190metering mecimnism.one unit; The post '1' is' ccmiecizcc through thecondenserwwith the coils of the finger1].,end e1soin vpen oi the hookswitch E. ,o The post .8 is connected with the othermizei'minzii of Lhewindings 11 of the ringer and. 3150130 the coils13 and 1 which are thesetting and actumbingl coiis respeckg The post 8 ringerll and Wi'h thespring 17, adapted to,

ms set position. lithe post 8 is, aico connected with the other fie miml 1.01; the resetting; 1105113 and) also to the xhitter T, The othertermina'l'of thecoii-L M1: is congested with e spring 22 adapted oiytheswitch 21. Else- Q incense transmitter T is connected through theprimary winding 25 of the induction coil with the spring 26 of the hookswitch H. The springs 27 and 28 of the hook switch are connectedtogether and also to the post 7 The secondary winding 29 of theinduction coil is connected in circuit with the receiver R in a mannerwell known in the art.

The terminals of the transmitter T have secured thereto springs 30 and31 adapted to be engaged by the upper end of the switch 21 when it isactuated, as a result of which the operation of such switch servestoshort; circuit the transmltter and connect itsiternnnals with the post8, and thus with the line conductor The cord circuit employed inconnection with my invention, as shown, consists of a 2-conductor cord,the tip strand consisting of the sections 32 and 33, connectedrespectively with the tips 34 and 35 of the plugs J and P and beingseparated by a condenser 36, as is usual in the art. The sleeve strandconsists of the sections 37 and 38 connected respectively with thesleeves 39 and 40 of the plugs P and P, such sections being separated bya condenser 41. The sections 32 and 37 of the cord strands haveconnected therewith the relay magnets 42 and 43, which the supervisoryrelays of the answering end of the cord circuit, their other termlna sbeing connected through" wires 14,

and :25 with the pivotal points of the armature 46 and Not the relay 48.The wire it has included serially therein the locking winding l9 of therelay 48. Thestrands 33 and 38 of the cord circuit have connectedtherewith the windings of the supervisory relay magnets 50 and 51, theother terminals of which are connected by wires 52 and 53 with thepositive and negative poles respectively of the battery The wire 52 hasserially included therein the main or actuating winding of the relaySections 33 and 38 of the cord strands extend through the ringing key K,by means of which current from the ringing generator (i may be impressedupon the calling plug P in a manner well known in, the art. An operatorsset 0 is connected with the strands 32 and 37 of the answering end oithe cord to perznit the operator to receive the order of the callingsubscriber. a

The armatures 46 and l? of the relay 48 normally rest against the backcontacts 56 and 57, connected by wires 58 and 59 with the negative a lidpositive poles res; Actively of the battery "l. The wire :39 is also conmated with the 'lront cont ct 60 of the armaturmdfi. he front contact 61of the arma ture 47 is connected by wire 62 with the positive brush 63of a generator G, the negative brush 64: of which is connected with Wire58 and thus to the negative pole of the battery 54. The generator G isdesigned so that it is energized, and this is accomplished periodicallyin the following manner: The winding of the field magnet 65 is connected68 is closed. The switch 68 is controlled by an electromagnet 70connected by wires 71 and 72 with the positive and negative polesrespectively of the battery 54. The wire 72 has included in it acommutator 73, rotated at a uniform rate by suitable time controlledmechanism, as a result of which the circuit through the magnet 70 isclosed at regular recurring intervals. The frequency and duration ofsuch intervals of energization. may obviously be made as desired byproperly proportioning and rotating the commutator T3.

The operation of my invention is as follows: Assuming that thesubscriber at substation Adesires to call the exchange, he removes hisreceiver R from the hook switch H, thereby completing a circuit frombattery 54: as follows: battery 54, wire 74, line relay 75, line wire 2,time meter 9, armature 16, contact 20, wire T5, wire 76, transmitter T,"primary winding :25, spring 26, spring 27, wire 77, line wire 1, wire78, and back to battery 54. Line relay 75 is thus energized and closesa. circuit from battery :34 through the line signal 79, indicating tothe operator at the exchange that a connection is desired.

he operator thereupon inserts the plugP in the jack J corresponding tothe signal 79,

whlch energizes the cut-oil relay by the following circuit: battery 54,wire 59, contact 57, armature 47, wire 45, sleeve supervisory relay 43,cord strand 3?, sleeve 39,

ring 81 of jack J, winding of cut-ofi relay 80, wire 82, wire 78, andback to battery 54. At the same time that the circuit just described isclosed and battery 5% is cut off from the line limbs 1 and 2, connectionis made from the battery till through the transmil-tor T at thesubstation A over the following circuit: battery or, wire 59, contact57, armature 47, wire 45, sleeve supervisory relay 43, cord strand 3?,sleeve 39 of the plug P, sleeve spring (3, line wire 2, time meter 9,Just 8, armature .16, contact 20, wire 75, wire :6, transmitter T,primary winding 25, spring 26, sprin 27, wire 77, post 7, line wire 1tip spring 5, tip 34 of plug P, tip supervisory relay 42, wire 44,looking wind- 1mg 49 of relay 4:8, armature 46, contact 56,

et the substation B;

telephone set 0, learns the connection. deo sired by the subscriber A,and, assuming that thesuhscriher B is wanted, inserts thecelling P inthe jack'd", connected W iththe L line conductors and extending to thesubstation l3. Thefloperetor there'uponuactilvt v ates the ringingkeyK,thuscdnnecting thc generatorG W ith the line limbs3' and 4, and

substation A actua-tes the ringer "11 located t The ringers llnaref allso constructed that when. current does not flow through thcmtlieir ernatures'close vthe contacts 20 to short cir'cu t the terminals-of theassociated coils 1 3 ofthe message" meters 1 l5.- Upon the response ofline wire 2, sleeve generator G", brusht hw 50, cord strand33,

" the generator the subscriber Bic circuit is closed through the linelimbs? and as followszhattery 54,- Wire52, energizing Winding 5'5 ofrelay 4:8,. tip supervisory relay tip of pluggPf, line wire 4:, to andthrough the apparatus atsub ststionB by e circuit similar-Ito thatabovetraced for the su bstationA, returning by line conductor 3, sleeve ofplug P, cord strand 88, sleeve supervisory relay 51, wire53, and.backtobattery 54. -V y t As o, result of theflowof'current' through thewinding 55, the crmatures" 46 and; i7 are attracted, thus connecting;-the supervisory relsys 4,2 and i3 withtlie positivepole of thei battery54 and thepositive brush ofthe. gen-'1 crater G respectively. this timethe circuitthrough the controlling magnet is open, the current in theline cirf cuit is reversed as follows; batteryffri wire 59, contact 69,armature 46, looking wind} ing 49, wire 4A, tip supervisory relay lQ',tip

, 3i, tip spring 5, line wire 1, through-the oppore-tug at thesubstatiomA in the reverse I to that above; traced, returningby spring(5,"sleeye 39, sleeve supervisory relay i3, wire 45, armature 47,contact 6].,wirc 62, brush 63, -arrrmture of ire 58, and back to Thusthe armature winding of i G I is" included in circuit at this time, butas theffield circuit is open only the ohmic resistance oi the {armaturedirection battery ,1 is included, and this is sosma-llias tovh'cve I Vflow through practically no eiiect upon the current flow. I lit is to benoted that the current sent out over the line wires 1 and 2 previoustothe energizction ofthe relay v48 causesqwcurrcnt flow through thewindings of the ringerll follows: line xvii-e2, time meter 9, posts,

' Spring 4 theglinewire 1:, i

8, wire 7T,post; .It is to be noted ia the direction of cur-' the .s othe ringer; 11 is. is. the some direction during the-signeh ing oi theexchange the sulostutioirA end during disconnect on,ortheensweringend ofthe 6011 1 totheliiiewircs l andflbe short-'circuiting each other, thusAssuming that at t 5 .the energizing win'ding hold the armature 16 in'ts normal position, 7

short circuiting the resetting coil 13 of the v I 15. hen the relay i8is en A ergized,"and, as above described, current flows from thepositive pole of]; the battery I 54=-out over line conductor 1, ill be0b'- message meter served that the direction of current flow vthroughthe vringerwindings '11. is reversed, as a result of which the armature16 is m moved .eway from the contactQO, opening the short-circuit acrossthe terniinalsof the coil13', which thereupon receives current in adirection to more theleft-hand end of. the arnieturew downward to cause,the erma ture to occupy its set-;position, (for, which ;j position thesprings 17 and 18 are moved into engagement with each other, thusz-igainthe coil 13 p to prevent iiur'- themmature 19,until the actuating coil 1'is energizedfl-It is tops notedtthat the m tio n above described Creearmature 19 to its set \positionbrings the springs 22 and 23 intoengegementf with closing at one point the em, erg'izin'g circultofthecoil 1.4. The srme ture's'id and M are held in their attracted'ggposition as long as the switchhiook at the substation is in its revisedor talkingposi-t" tion,' cnd even if the switch be subsequently movejyoits normal position, opening the; circu; throughthe/supervisory re theroperation of 55, thelockiug'vv nd r ing 4 9 is so proportioned as toretain the zip natures l6 and 47 in'theircttracted 'posi tron as longasthecurrent such locking winding,due' to the switch hook 5 attheswbstation A being in its upper or talking position. I After therelay durin the time that vthe armctures 47 are held in theircttractedposition, arnmture of the generator G is retained in I thecircuit above described. The generator; G" is so constructed astoproduce en elec-Q tromo'tive force about twice that-of the bet 48 'hasbeen energized and 46 1 and tery 54, andsinc'e its negative brush64: isiisf connected with the negetiveterminal of the battery 54;, theelectromotive force developedpartly consumed in charging the battery r54 during tli'e'intermls that the field 65 is r portion oftheelec- J20energized,- the remaining tromotive force developed by the generator ibeing impressed upon the circuit in which, 5

its armutureis connected as follows: positive I Wire: 45, relcy, 4J3,sleeve 39, sleeve spring U through the appirrotusp wire .59., battery54:, ire 58,to theregeti'ie E1 9 lay mend the o v aun ;plac1ng thereceiver R battery,

brush 64'of the generator Gr. Thus, during the intervals that th fieldof the generator' is energized current is impressed upon the linecircuit in the same direction by the generator G as the current wascaused to flow through such line circuit by the battery 54; before theenergization of the relay 48 from which it follows that the successiveenergization at recurring intervals of the field 65 of the generator Greverses the direction of current flow periodicully through, the lineconductors l and 2, therefore, causes actuation of the time hismetertherefore serves to reglisten the length of time H1 htelechllQhesbetween the response of the called subscriber and the restoration of thapparatus at the callingt substation to itsnormal condition by upon thehook switch It is to be noted also that the current generated by thegenerator G flows through the battery si l in a direction opposed to thenormal direction of current flow from such and that therefore during theactive of the generator G the battery 55L 1S 0 a'rged.

Assume now that the condition of a ratus described above has beenproduced by a call from the substation A, as a result of which theapparatus at the substation B is connected therewith in. the mannerabove described, and that during such a connection the subscriber atsubstation A, before making a call, wishes to learn if the party line 1,2 is busy, he first depresses his trey 2.1 thereby shortcircuitiug theterminals of the transmitter T, and also short-circuiting the terminalsof the setting magnet 13 of his message meter 15, such short-circuitbeing traced. through wire 76, contact 31, switch 21 and wire 84. Withthe switch 21 in its actuated position the receiver R is removed fromthe switch H, and the primary winding 25 is thereby connected in circuitwith the line wires 1 and 2, as above described, and the subscriber atsubstation A can hear ppa- . whether the line busy. The operation of theswitch 21 serves to pilotezttnc resetting coil 13 from the flow ofcurrent from the line wires 1 and 2 ii. at this instant it should occurthat the direction of current flow in such line wires was that requiredto separate the armature 16 of the ringer 11 from the contact 20. Thusthe subscriber at station A is afforded a means vfor determining thecondition of the party line to which be is connected without having ucall charged up against him, but he is unable, to hold a conversation atthis time since his transmit: ter T is ghort-circuited. Were it not forthe short-circuiting of the resetting coil 12; during the operation oflistening-in to dowrmine whether the line is busy, the armature 19 mightbe moved to its set positiornassuming that the direction of current flowin l substation, and that a connection has the line-1, 2 was proper tocause this result, and this would cause a closure of the contacts 22 and23, as a result of which the hanging up of the receiver R would completethe circuit through the actuating winding 14; and even if the directionof current flow at this time were not that required to actuate themagnet 14, a subsequent reversal of direction, due to the continuedconnection at substation A, would serve to actuate the magnet 1%, thusadvancing the message meter 15 one unit.

It is to be observed that during the entire period of listening-in withthe switch 21 depressed, whether the interval be long or short, the timemeter 9 is connected in circuit, and thus a means is aiiorded for indi:cating the total length of time in telechrones that the apparatus at thesubstation A is operatively connected, Whether as a result of initiatinga connection or listening-in on a connection already established.Assuming again that the substation A is the calling been effected withthe substation ll, at the termination of the conversation the receiver Ris placeduponthe hook switch ll, at which time the armature 19 is in aposition closing the contacts 22 and 523, since the first reversal ofcurrent in the line wires 1 and 2 resulting from the completed talkingcir cult serves to move the armature to such position, and a circuit istherefore closed through the actuating winding 1-1 as follows:Clhcnviiuling 14 is preferably so constructed that under the influenceof the permanent magnet 86 it requires current from battery M to actuateit rather than current from the generator G, as a result of which thecontacts 22 and 23 maintain in closed condition thc circuit through therelays -12 and 43 and locking winding ll), as above described, althoughsuch circuit is open at the contacts 12 and oi the hook switch H. uring;an inoperative interval of the genera tor G, current flows as follows:battery 5%, wire contact [30, armature 46, looking winding all, wireall, relay i2, ti Ill, tip spring :3, line wire 1, post i wire 77,spring 28, spring Ell, wire 85, springs 23, spring 22, actuatiup coillei, post 8 time meter 9, line wire 2, sleeve spring 6, sleeve 39, relay43, wire 45, arn'iature a'i", contact 61, wire ()2, brush 63, armatureof generator G, brush 6%, wire 58, back to battery (J-l. his causes theenergization of the actuating coil lei, moving the armature 19 to theposh tion indicated in the drawings, as a result of which the contacts522 and 23 are separated from each other, thereby opening the circuitthrough the relays 42 and and the locking winding t ll, as a result ofwhich the relay -18 is deencrgizerl--assuiniug that the subscriber B hashung up his receiver before the subscriber A. has done so. If, however,

up his receiver, the relay 4% Tel m ing the circuit through. the sn pe Blmnging'up his receiver,

would occur if the relay nee;

at this time the subscriber E immediately upon Elle enbscriber it is dc.rgizecl since the circuit through the 1 v ei'gifin Winding 55 is openedendflzlie l gized, but

ing L9 is at this time we in. opcmfin inon.

From the above ii; will. be neiicecl-eiiei; si e control of the relay4:8, new i; DEHCQG-ILGYW gized, rests Willi the caliingsubscriber, sincesuchvrel'ay can only be deiinergiz eillayopen-- lav 4-2 associated ofthe cord circiiinencl eh:

pe'eteclly energized and actuation of ilhe switch substation.Theserepemhecl ciirientiei ei'siils ing subscriber if he were Waitingcurrent flow in the calling Smaller.

face e plurality toward She ratchet to which motion of the armature 19is ine theffiiction of thenioving pertsmay particularly eimo'ying to the'celk fore second connection and had his reeeiyeifofif eke switch-hookafter tlie'conversetion with elie subscriber B'liacl been'teitininetecl. filingstliey undesirable result of: leeving'iliemelay i8under ine conm'ol of the calledsnbscriber would be that actilsition ofthci'lelmy l8 by the liook 'switch at we celleclwsnbetetion wculflresult-in reversing the clirection'of v line a reater number of izimesthan would lJQ-illfiifl would lie sse if the reversal were due entirelyto the time"; controlled mechanism at iilie eizclmnge and thus an addedregistration Gfl'illitll e-l Wou'lclresult, and iheqnetei would thenumber of telechi'onee as the epi'gzirent c service giventhe callingsubsmtion whereas the actual amount of service would; be

As shown in 2, the unitsqwlieel15 of the message nickel-*1!)liaee'xtentling from its of pins 15?, extending v wheel 15v, secured tothe Wheel 15, which ratchet \ilieel is sniliciently displaced fromtheiinits Wheels 15"tliat the pins 15" clear the actuating pawl 15carried byiiille armature 19 ofthemetei'. The nrmw time 19 also carriesa1 i'igiclq rojecting arm- 19 adapted :0 move bizt'weentwo oiiiiie pine15! when, islic airmatm'c 15) is actuaieclfln Such a manne i AS- heprevent tlieol d Vance of the units wheel 15? beyomlits proper poeitiontended to move it. The pins and'tlie aim L19 thus constitute amechanismfor preventing the jovertln'mv oi the units wheel I 15, due to itsinertia. A liolcling pawl 15*? is proviclcd to engage therat-chebflwheel i5 when the Wheel 15 mlvancedyso tliiit'one of the pinsifi is nearly or ("mile in engage merit with-vibe m ni 19. This providesialifi made; very small ailii we the einstmen of the ecfiiiai ing awithout danger oi": false operation for ,ilie use of "QllSUbScrlbBi't'mnsmissien e'nd disabling originating: substations, of telephonelines exiencimg from :iubet such subsections for registering pawl may bes.

ne her clilection of theunits wheel 15. i w I While niyeyteni is jsl10wnherein as ep m pliccl to a manual telephcne systemcitisito;

be ender stood that it is equally applicable 1 to any telephone system,whether meniielflr Y automatic, in which cnrrent is snpplieci atexchange tlifi-englisuiteble means toe con 7 g motion to operateRlBfiGTSil'S the substations, While 1 have shown my invention initliepeptieular emli ocliments herein clescl ibeii vl lo not, however,'liinibfmyselii to this 6911; I sti'nciiiqinbni desire aid-claim anyequivalent 5 thei nieyfsnggesifi itself to those slcill egl in. the MirJ i Wilhai; I claim is: I I 1, fl1ti e tel QllOIlfi syste neinployingeamie for seiriice'lva segl upon the number of mefiw and i; e iduretionof conize 'setiom originetin eubstetions, the combination,cfibeleplione' lines exteiuling fromeubstev tionewto" an exchange, timemeter one OfSllC-ll subsst-etions forjregistering the len fiiii w oftime the substationiein use for outgoing 'inessage's, a mesaafge meter 3suchsi bstelsicii for recording the number of" outgoingckimallfiGi'lQIlS fiStlbllSllQi and, means 'lfaSQGlljGilr with the messagemetereiid 'trensmittef "a? oegselole ofiprevey;

&

ing out-going transmission and, Qisaiilin meecnge meteix I 2. in .El,'teleplicneeysiem employing m for service besecl ujiicnjtlie nuinbei"oflniesnilw sages and origineiingnt s ii osbatione, the co nbin'zltie'nof telephone lines eiifiencling frem SulJSflmli ii'oiis to an Xcl enge,e meterfiefbyon of such substations for iregistering falie lengi of timethe substation talking epparetusqie innse for outgoing messages only, emeesegeq meter for outgoing messages only also aw finelysubstation,means for the iseiof til subscriber capable ofipreve tiny; outgem 11mthe outgoing; inessegefliiieter, seijclfmeans being furtlie capable ofper i tting incoming transn si on and the operiition olf 'blietime mete3. line telephone sys'ieni employing; a, e, for service baeelf ipon themznibenof me sages i ncl -ilie filtration of conversaionstjliejconibinciiion. i

tions so an exchange tl enlengfih a:

oi time the substation telking eppamt ie/is in use, a inessagemetenntsucl i substation:

for recording the, number of 'connection.s1es-w tabl'ished and means ifor connecting siichcep alfi f pzi 'ntus with the line I sages and theduration of conversations originating at substations, the combination oftelephone lines extending from substations to an exchange, a time meterat one of such substations for registering the length of timethesubstation talking apparatus is in use, a message meter at suchsubstation, means for the use of the subscriber capable of preventingoutgoing transmission of voice currents from the substation anddisabling the message meter.

5. In a telephone for service based upon the number of messages and theduration originating at substations, the combination.

i .at a substation of talking apparatus, a time neously connecting meteradapted to record the duration of outgoing messages, a message meteradapted to record the atlve y connecting the transmitter.

6. In a telephone system employing a rate for servicc'based upon thenumber of messages and the duration of conversations the combination ata substation of talking apparatus, a time meters in operative condition,and means for connecting such apparatus and simultaneously disabling themessage meter and transmitter only.

7. In a telephone system employing a rate for service based upon thenumb sages ,and the duration of conversations originating atsubstations,the combination at a substation of talking apparatus, a time metersoperative condition, and for operatively connecting such apparatus (1simultaneously disabling. one-1 of such meters withoutinterruptmglincoming transsubstations having 8,111 afitelephone tememployin a rate for-service based ugh the number if messages; and he.duration of conversations at substations, the combination of talkingapparatus, a time means for simul tancously connecting such apparatusand meters in operative condition and means for operatively connectingthe receiver of the talkingapparatus and simultaneously connecting inoperative condition but one of said meters.

9. In a telephone system, the combination of telephone lines extendingfrom substations to an exchange, one or more of such apparatuscomprising a transmitter, a receiver, a time meter autosystem employinga rate of conversations er of mestion at i nutter,

matically controlled by two different sources of current, controlled bythe called subscriber and a message meter, and means. for opcrativelyconnecting-the receiver and one of such meters to the corresponding linewithout operatively connecting the other meter.

10. In a telephone system, the combination of telephone lines extendingfrom substations to an exchange, one or more of such substations havingapparatus comprising a transmitter, a receiver. .a time meter and amessage meter, and 'm rails for operatively connecting the receiver andone of such meters and simultaneously disabling the transmitter and theother meter.

11. In a telephone system, the combination of telephone lines extendingfrom substations toan exchange, one or more of such substations havingapparatus comprising a transmitter, a receiver, a time meter and amessage meter, means for operatively connecting all of such apparatus tothe corresponding line, and means for operatively connecting thereceiver and one of such meters, and simultaneously disabling thetransmitter and the other meter.

12. In atelephone system. the combination of telephone lines extendingfrom sub stations to an exchange, one or more of such substations havingapparatus comprisin a transmitter, a receiver, a time meter and amessage meter, a hook switch for connectin the meters and talkingapparatus with the line conductors, and a switch adapted when operatedto short-circuit the transmitter and the message meter withoutinterfering with the operation of the receiver and time meter.

3. In a telephone system, the combine a substation of a receiver, atwins :1 time meter, a message meter, and means for operativelyconnecting the receiver and one of such meters and simultaneouslydisabling the transmitter and the other meter.

14. In atelephone system, the combination at a substation of a receiver,a transmitter, a time meter, a message meter, means for operativelyconnecting all of such appir ratus to the corresponding line, and meansfor-operatively connecting the receiver and one of such meters andsimultaneously dis ablingIthe transmitter and the other meter.

a substation of a receiver, a trans a time meter, a message meter, ahook switch for connecting the meters and the line conductors, an aswitch adapted .When operated to. short-circuit the transmitter and themes: sage meter without interfering with the operation of the receiverand time meter,

In a telephone system, the combination of telephone lines extending fromsubstations to an'exchange, two sources of curn a telephone system, thecombinarent upp y; sources, a meter endtalking a prising e'receiver andtransm "such substationsand means for 'operetively ppaiatus com- Iconnecting the receiver with the line ithout ing subscriber, and; means?at the exchange operatively connecting suchmeter and transoperable bythe called subscriber for act-mat mitten. i x ingythetime meter,theoperationof such 1 7 In e telephone system, th combina "means servingto remove it from the control tion'of telephonelinesextending from subfof, the celled subscriber and place it under; 1o, stationsto anexcharfgmytwo sources of cur-, the controlof the calling subscriber;

rent supply eutomsti'celly c control r-fo'r oneci'of said sour talking*epparatus at 0 comprising a receiver an cos, a; meter and ne sucemitted, m

a time control: for one of said.

itter at one of ontrolled, s; time J T h substations. d trensmittenmeansstations for registering thejlength oftiine the substati r at suchsubstation auto e= message mete matically recording cells; initiated,by, at cell 23, In a telephone system, the combine 1 tion of telephonestations "to an exchange, nism htthe exchange 'for too switching meclinnectingthe lines for'connecting such apparatus and meter. in forconversation, a timeme'ter at one of such 3 operative conditionandfmeans for connect-T substations forregiste'ring thelength of time Iing the receiver with the line and atthe lthesubstationtelking apparatusiscinuse, av same time disabling such meter and transmessage meteriatsuch substation nntometi mitter. f l i cally recording callsinitiatedbye "calling 2o 18. In a, telephone system, the combinessubscriber, m'eansfor connecting'the receiver tionof "a receiver, twosources of current Iofthetalkingapparetuswith the line vithsupplyautomatically controlled, at tim ic'onout operz tiyely connecting suchiII IBSSfi gG trol for one of said sources, etransmitter, a meter, andmeans at the exchange 'opereble meter, and mennsfor operutivelyconnecting by the called subscriber forectueting the Y the receiverwithout operutively connecting time-meter, theoperetion of such mennsigcthe meter and transmitter; serving toremoye-it fromuthe'control of the19.111 a telephone system, the combinzicalled subscriber. i i c I M tionof e receivergtwo, sources'of current -2 l, In a telephone-system, 'theconibinev s'upplyautomaticeily controlled, :1 ti'inelpon tiono'ftelephone lines extending from sub- 1 trolfor one of saiclsources,e-ztronsmitter, a, 1 stations to an exchange, switching Inccha'-. 93meter and means fortoperatively connecting nisin'zit theeztchz ngeforconnecting the lines; the receiver without op'eratively' connectingfor conversatiomn time meterzit one of. such the meter and at thesametimedisehling the substations. for registering the length "of timetransmitter. I i j the substation talking apparatus is innse, n l 20.111a telephone" system, the combinamess21ge meter at suchsubstationm tonmthm "'tion of a receiver, two sources of current. celly recording cellsinitiated byn culling 'supply'automaticnlly controlled, :1, time con;itsubscriber, means forco'nnecting thercceiver trol for'oneof'sziidisources', atransmitten, a ofl thetalking apperntuswiththelinewith meter, means for'operatively connectingthe 'outf.operetivelyconnecting such message receiver, transmittefand meter, andmeim'smeter,, nnd m a st h x h nge p a e 'for-opera,tively connecting thereceiver with by the called subscriber for nctuz'ttingthe I ur, tiv lyconnecting the meter endaat time meter, the operation of such means qthesame time disabling the transmitter. serving to remove it from thecontrol of; the 21'. In a, telephoneisystem, t11 .;;0 bimL-; "calledsubscriber and pleceitunder thecon-. e5 tion'oftelephonelinesextendingfrom subtrol of'the calling subscriber. I l 11g stations'to an exchange,switching mechrh c 25.1mm telephone system, the combine;

nism at the exchange for connecting the,,ti'on of telephone line tndingfrom sulw lines for, conversationend two sources of stations toaneXchengeswitching meshe constant current of different character, anism et the exchange for connecting the I time meter at one' of such substutionsifor lines. for conversatiome time meternt one 115 registeringthe length-of time the substation of such substations for registering;the t lki g tus is inns'e, a message'meter length f, time thesubstationtalking apps; at such substationautomatically recording rat'usisinnse,-n message meteri at such s cellsjinitiated by a callingsubscriberyand stationfmeans for connecting c'theireceiyers v meens'stthe exchangeoperable by the celled of the'talking" apparatus withtheli'ne end- 32s subscriber for actuatingthe time meter, the"simultaneously disabling, themesscge matey operation of suchmeansseryingf toremoveit' and meanest-the exchange operable by the from thecontrol bffthecalled subscriberl called subscriber-for actuatingthetinie [22. In etele'phone system, the combinak vmeter,"the operation ofsuch mea'nsseryin i 1 "tion of telephone lines extending from; sub toremoye itg rom thecontrcl of the calls stetionsto' an exchange,switching" mech'av1 subscriben 3 i g (:nis er, change for connecting thelines; 26: In e telephone; system? the comhin" fdi co versa'tionand twosouroesiofconstent; tionof'felephone lines extendingrfrom so curren'of-diiierent cherecter automatically" stationstoan"exchange,,switchizrgfm e meme-on oi suchlsub 'nism et'the-exchengeffor ionnectin t ontalking apparatusis in use,"

lines extending fromsub-g; Y

' transmitter,

message met a-,

lines for conversation, a time meter at one of such substations forregistering the length or" time the substation talking apparatus is illuse, a message meter at such substation,- means for connecting thereceiver of the talking apparatus with the line and simultaneouslydisabling the message meter, and means at the exchange operable by thecalled subsiizribcr for actuating the time meter, the operation of suchmeans servin to remove it from the control of the called subscriber andplace it under the control of the calling subscriber.

537. In a telephone system, the combination of telephone lines extendingfrom substations to an exchange, one or more of such substations limingapparatus comprising a a receiver, a time meter and a cord circuits atthe exchange for connecting the lines for conversation provided with twosources of current of differ-cut character, and means at the exchangeoperable by the called subscriber for actuating the time meter of thecalling subscriber, the operation of such means serving to remove itfrom the control of the called subscriber.

28. In a telephone system, the combine tion of telephone lines extendingfrom substations to an exchange, one or more of such substations havingapparatus-tomprising a transmitter, a receiver, a time meter and amessage meter, cord circuits at the exchange for connecting the linesfor conversation provided with two sources of current of differentcharacter, and means at the exchange operable by the called subscriberfor actuat 111g the time meter of the calling subscriber, the operationof such means serving to remove it from the control ofthe calledsubscriber and place it under the control of the calling subscriber.

29. In a telephone system, the combination of telephone lines extendingfrom substations to an exchange, one or more of such substations havingapparatus comprising a transmitter, a receiver, a time meter and amessage meter, means for operatively connccting the receiver and one ofsuch meters to the corresponding line without operatively connecting theother meter, cord circults at the exchange for connecting the lines forconversation, and means at the exchange operable by the calledsubscriber for actuating the time meter ofthe calling subscriber, theoperation of such means servin to remove it from the control of thecalled subscriber.

30. In a telephone system, the combination of telephone lines extendingfrom sub stations to an exchange, one or more of such substations havingapparatus comprising a transmitter, a receiver, a time meter and amessage meter, means for operatively conmeeting the receiver and one ofsuch meters for connecting .for connecting the lines for transmitter, areceiver, a time meter and a.

message meter, cord circuits at the exchange the lines for conversation,means for operatively connecting all of such apparatus to thecorresponding line, means for operatively connecting the receiver andone of such'meters and simultaneously dis-- abling the transmitter andthe other meter, time controlled impulse sending mechanism, and a relayadapted tobe actuated by response of the called subscriber to connectsuch mechanism to the calling line, such relay having a locking windingin circuit closed through the answering connection of the cord circuit.

32. In a telephone system, the combination of telephone lines extendingfrom substations to an exchange, one or more of such substations havingapparatus comprising a transmitter, a receiver, a time meter and amessage meter, cord circuits at the exchange conversation, means foroperatively connecting all of such apparatus to the corresponding line,means for operatiyely connecting the receiver and one of sucu meters andsimultaneously disabling the transmitter and the other meter, timecontrolled 1 upulse sending mechanism, and a relay adapted to beactuated by response of the called subscriber to connect such mechanismto the calling line; such relay having a locking winding in circuitclosed through the answering. connection of the .cord circuit and theapparatus at the calling substation.

33. In a telephone system, the combination of telephone lines eachextending from aplurality of substations to change switching mechanismfor connecting the lines for conversation, a time controlled source ofcurrent. a time meter at one of such substations, for registering thelength of time the substation talking apparatus is in use for outgoingmessages, a message meter at such substation, automatically recor ingcalls initiated by a calling subscribenand means at the exchangeoperable by the called subscriber for actuating the time meter, theoperation of such means serving to remove it from the control of thecalled subscriber.

system, the combine a central ex-- 34. In a telephone system, thecombina tion of telephone lines each extendingfrom a plurality ofsubstations to an exchange, switching mechanism at the exchange forconnecting thelines for conversation, a time meter at one ofsuchsubstations for registe'ring the length of time the substationtalking apparatusis 1n use, vamessage meter 7 the called, subscriber andplace itunder the the lines time meter control of the callingsubscriber,

' 35. In a telephone system, the combination of telephone lines eachextending from a plurality of substations to an exchange, switchingmechanism at the exchange or connecting the lines for conversation, a'at oneof such substations for the length of time the substation in use,a message meter means for connecting registering talking apparatus is atsuch substation, such apparatus with neously disabling the messagemeter,and means at the exchange operable by, the called subscriber foractuating the time meter, the operation of such means "serving toremoveit from the control of the ealled subscriber; I g

36. In a telephone system,-the co .tion of telephone lines eachextending a plurality of, substations to an exchange, one or more ofsuch substations having aps paratus comprising a transmitter, a re?ceiver, a time meter and a messa e meter for automatically recordingcalls lnitiated by a callingsubscriber, means for opera tivelyconnecting the receiver and one of such metersto the corresponding lineWithout operativelyiconnecting the other meter, cord circuits attheexchangefor connecting for conversation, and means at the exchangeoperable by the called subscriber for actuating the time met er," theoperation of such means serving to remove it from the control of thecalled subscriber and place it under the control of the callingsubscriber.

37 In a. telephone system, the combination of telephone lines eachextending from a pluralityof substations'to an' exchange, one or more ofsuch substations having apparatus comprising a transmitter, a receiver,a time meter and a message meter, cord circuits at the exchangeforconnecting the lines T for conversation, means for operati'velyconnecting all of such apparatus to theco'rre- 'sponding line, means foroperatively connectingthe receiver and one of such meters? andsimultaneously disabling the transmitter adapted to be actuated the lineand simultameter of said substation..

for listening in on and transmitter of Y to operate time meters,

and the other meter, time controlled impulse sending mechanism, and

actuated by response, of the called subscriber to connect such mechanismto the calling line, such relay having a, locking winding incircuitclosed through themswering connection of the cord circuit. l 38. In atelephone system, the combination of telephone lines each-extending fromatplurality of substations to an exchange, one or more of suchsubstations havingap paratus comprising a transmitter, a receiver,

a timerneter anda message meter, cordcir-a cults at the exchange forconnecting the lines for conversation,

means for operatively connecting all of-such apparatus tovthe cor--responding line, means for opcrativelycona 'necting the receiverandvoneof such meters andsimultaneously disabling the transmitter andthe other meter, time controlled impulse sending mechanism, and arelayby response of the called subscriber to connect such mechanism tothe calling line, such relay having a locking winding in circuit closedthroughrtheanswering connection of the cord circuit and the apparatus atthe calling substation? 39; In a telephone system, ,a time controlledsource of current, aparty line having a plurality of substations,message an time'me'tersat one or more of such stations adapted to be.actuated by current reversal 1n the line, and means for listening in onthe lineat one or more of the substations a relay adapted to doc so i

when busy without actuating the message 40. In a telephone system, thecombination of telephone lines each extending from a plurality ofsubstations to an exchange, a. time controlled source of current attheex change tooperate time meters, a time meter at one of. suchsubstations for registering the length of time the substation talkingapparatus is in use for outgoing messages-a message meter at suchsubstation and means tion' without actuating the message meter thetalking apparatus. 41. In a telephone system, the coinbination oitelephone lines-each extending from a plurality of substations to anexchaiuge, a s

time controlled source, of current at the ex;- change to'operate themeters, one or more of such substations prising a, transmitter, meterand message listening in on a busy the'.message meter.

v4:2. In a tel phone system, the combinaa v lines each extending from 1aplurality of substations-toad exchange, switching mechanism at theexchange for tion of telephone connecting the lines for conversation, atime controlled source of current at the exchange a'bu'sy lineatsuchstahaving apparatus coma receiver, a time 1 meter and means forline without actuating a time meter at one 13e of such substations forregisteringthe length of time the substation talking cppzo ratus is inuse for outgoing messages, it message meter at such substation, means utthe exchange operable by the called subscriber for actuating the timemeter, the operation of such means serving to remove 1t from the controlof the called subscriber and means for listening in on a busy lineWithout actusting the message meter.

43. In a. telephone syste1n, the combination of telephone lines eachextending; from a plurality of substations to an exchange, one or moreof such substations having epperatus comprising e transmitter, a timecontrolled source of current at the exchange to operate the meters, areceiver, a time nnd' it message meter, of cord circuits at the eX-change for connecting the lines for convern action, means at theexchange operable by the called subscriber for actuating the time meter,the opcretlon of such means serving sources is of a periodic character,and means operuhie by response from the called subscriber to connectsaid periodic source with the, ceiling subscribers circuit.

In witness whereof, I hereunto subscribe my name this 29th day of June,A. D., 1910.

GARRISON BABCOOK. Witnesses: ALBERT C. BELL, Lnoneno E. Boom-1.

